Hello,
Picking up on Rishabh's nice work (and others) I thought I'd share a spreadsheet that could be useful for those who like to keep an overview of their items on different chars.
There are 3 sheets, one for Sacred Uniques, one for Sets and one for Unique Mystic Orbs.
Idea is to update column G with your character names, then color code the items as you find them and place them on your mules. You can then easily filter to find the item or to see what you have on a given char.
Full List of Items